File:Zip gun concealed in shoes heels removed.jpg

Inside his removable shoe heels, they discovered a small but effective zip gun that could very well have been used to kill an unsuspecting officer or guard.

The following article appeared in the May 1968 issue of the FBI Law Enforcement Bulletin, page 26: FBI Expert Links Bullet to Suspect's Weapon. An Arizona businessman, his wife, and their dog left their home in Phoenix on September 12, 1966, for a motor vacation in neighboring Colorado. When nothing was heard from the couple after several weeks, friends and relatives became alarmed and notified police. On October 23, 1966, the couple's bloodstained camper was found on a parking lot in Del Norte, Colo. A .45 caliber bullet was recovered from an inside wall of the vehicle. A week later the bodies of the man and his wife and dog were found in an outhouse on campgrounds in another part of the State. Both the man and his wife had been shot through the chest. The dog had been beaten to death. Investigation in the case resulted in the implication of a parole violator who was arrested by the FBI and local police on December 10, 1966, in Michigan for unlawful flight to avoid prosecution. The suspect, a 26-year-old recluse, had been living in a cave. A zip gun and cartridges concealed in the heels of his shoes and a .45 Colt automatic located in a footlocker were recovered at the time of his arrest.